[MJAVADOC-538] Filter out 'Picked up'

[risdenk]

Tested with:

• mvn -Prun-its verify

Additional testing on project I was having original issues

• mvn install
• export JAVA_TOOL_OPTIONS="-Dapple.awt.UIElement=true"
• Set pom for project to use 3.0.2-SNAPSHOT

<pluginManagement>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-javadoc-plugin</artifactId>
      <version>3.0.2-SNAPSHOT</version>
    </plugin>
  </plugins>
</pluginManagement>

• Ran the following on my project - mvn -Dmaven.javadoc.failOnError=true -Dmaven.javadoc.failOnWarnings=true javadoc:javadoc javadoc:test-javadoc

Prior to this change was getting failure from warning "Picked up ...". With this change, Javadoc no longer fails due to warning.

[yrodiere]

FWIW, I can confirm this solves the problem in my project. Thanks!

[risdenk]

Added integration test.

[rfscholte]

Just a couple of small things to improve, almost there.

[risdenk]

@rfscholte Addressed your review comments. Thanks!

[rfscholte]

One final request: add yourself as contributor to the root pom.xml if you want.

[risdenk]

@rfscholte added myself as contributor. Let me know if there is anything else :)

[rfscholte]

https://builds.apache.org/view/M-R/view/Maven/job/maven-box/job/maven-javadoc-plugin/job/MJAVADOC-538/
I need to figure out what's wrong with Windows + Java 7 before merging (looks unrelated to this commit)